Asian equities came under renewed pressure on Wednesday as a sharp decline in semiconductor shares weighed heavily on markets in South Korea and Japan. Higher global bond yields and continued uncertainty surrounding the Middle East also encouraged investors to reduce exposure to growth-focused assets.
The MSCI Asia-Pacific equity index dropped around 2%, while U.S. equity futures also edged lower following a technology-led decline on Wall Street. The Philadelphia Semiconductor Index suffered a major setback, falling 5.6% in its biggest daily decline since late July. Micron Technology dropped about 7%, while Nvidia declined 2.3%.
Rising Bond Yields Add to Pressure
The weakness in technology stocks has also been linked to elevated U.S. Treasury yields. The 30-year Treasury yield climbed to approximately 5.34%, its highest level since 2007, while the 10-year yield remained near 4.69% during Asian trading.
Higher interest rates can put additional pressure on high-growth companies because future earnings become less valuable when discounted at higher rates. This has made investors more cautious about highly valued technology and AI stocks.
Markets are also awaiting the Federal Reserve’s July meeting minutes, which could provide further clues about policymakers’ views on inflation and future interest-rate decisions. The U.S. Treasury is scheduled to auction $16 billion in 20-year debt, while oil prices remain elevated amid continuing geopolitical tensions, with Brent crude trading above $90 a barrel.
South Korean Stocks Lead the Decline
South Korea was among the hardest-hit markets. The KOSPI fell approximately 5.5% to around 6,495 points after dropping more than 6% earlier in the session.
The sharp decline came just one day after the benchmark had gained more than 2%, extending a six-session winning streak. The reversal suggests investors are taking profits and reassessing the sustainability of the recent rally in semiconductor and AI-related stocks.
Major chipmakers suffered substantial losses. SK Hynix fell 8.4%, while Samsung Electronics declined 7.3%. The intense selling briefly triggered a market “sidecar” mechanism designed to help stabilize trading during unusually volatile conditions.
Because Samsung Electronics and SK Hynix represent significant portions of the KOSPI, movements in the global semiconductor industry can have an outsized impact on South Korea’s benchmark index.
Investors Become More Selective on AI
The broader AI investment theme remains strong, but investors appear increasingly concerned about valuations and the time required for AI investments to generate measurable returns.
Recent Bank of America investor-survey data indicated that many fund managers are reducing AI-related downside risk by moving toward value, cyclical and defensive sectors. Investors are also looking for clearer evidence that heavy spending on artificial intelligence is translating into sustainable revenue and profits.
Japan and China Also Under Pressure
Japan’s Nikkei 225 declined around 2.4%, while the broader TOPIX lost approximately 2.7%. Semiconductor and technology-related companies were among the biggest decliners, with Kioxia falling 8.9% and TDK losing 4.1%. Sony also moved lower.
Chinese mainland equities weakened as well. The CSI 300 dropped roughly 2.4%, while the Shanghai Composite declined about 2%. Hong Kong’s Hang Seng Index, however, was relatively stable.
Baidu suffered a particularly sharp decline, falling 12.5% after disappointing quarterly revenue figures raised concerns about weakness in advertising demand.
Xiaomi moved in the opposite direction, gaining about 6.4%. Although the company reported a significant decline in adjusted second-quarter profit, investors appeared encouraged by growth in its electric-vehicle and AI operations.
Meanwhile, Chinese robotics company Unitree attracted strong investor attention after its Shanghai debut, with the stock reportedly surging several times above its initial offering price following exceptionally strong retail demand.
Wider Asian Market Moves
Other regional markets also traded lower. Australia’s S&P/ASX 200 declined about 0.3%, Singapore’s Straits Times Index fell around 0.4%, India’s Nifty 50 opened approximately 0.3% lower, and Indonesia’s Jakarta Composite slipped about 0.6%.
Australia remains under observation after RBA Deputy Governor Andrew Hauser indicated that another rate increase could become necessary if inflation pressures intensify. Indonesia’s central bank is also scheduled to announce its latest monetary-policy decision, with markets largely expecting rates to remain unchanged.
Market Outlook
The latest selloff highlights the growing sensitivity of Asian markets to semiconductor valuations, interest rates and geopolitical developments. While the long-term outlook for AI and technology investment remains a key theme, investors are becoming more selective as borrowing costs stay elevated and expectations for corporate earnings face greater scrutiny.
For Asian markets, the next major catalysts will likely include central-bank guidance, movements in Treasury yields, oil prices and upcoming earnings from major technology and semiconductor companies.